Hello to everyone! In the two years since I started in the hobby, a considerable amount of hornwort has passed through my rather small tanks. At first they thrived, but then they started withering away and now ... all have died. I know they can not coexist wit Elodea, and never had the latter until all my hornwort had died. They are, says and writes everyone, one of the hardiest plants freshwater has seen since 2 millions of years. There are a couple of plants that have not let me down in 2 these years. A Java fern, the very first plant I bought for my first tank keeps slowly but steadily growing and so do the intriguing moss balls. I use Seachem Flourish. Could anyone enlighten me? Many thanks in advance for any reaction!